Grinding-machine.



- W. B. NICKBRSON.

GRINDING MACHINE.

APPLICATION FILED MAY15, 1905.

1,126,839. Patented Feb.2,1915.

'I SHEETS-SHEET 1.

W. E. NICKERSON.

GRINDING MACHINE. APPLIGATxoN FILED MAY 15,1905.

Patentedf'Feb. 2, 1915.

7 SHEETS-SHEET 3v W. E. NGKERSQN.

GRXNDING MACHINE.

u `APPLIOA'IIGE FILED B1AY15,1905. 1,1 @9539, Emme@ @ab f5, w.

GRINDING MACBNE.

APPLIGTION FILED MAY 15,1905,

@muted M1915.

7 SHEETS-'SHEET 6.

ff f@ ...Ang scz'atehes. Mgg. l0 is f showing blade mounted in hamm', the .lpplimim off she *g t@ Sher/aun and h@ lehgve adjustment nl @magy l Y -v 1, :giada have] he @inning wavl'xee. Fig. il. 15 fines@ Wdwijj@ wfg@ vHffwuif, 1S an end el of h@ spring' hcldexr Sam@ mi 0f simpa.. These a pfxn View of me @umd by means of the fallo fn S= 3 is. '1 de elevation 11 the 7G tures: Firm. he appcaog o. l 1 s u ep'mon shmvmg @Ming @mss motion o' *ma gilndmg dansent im?. blaue insane-L. L in 1s l @1de elm :x-

anger :md

weaving l namely in the direction of the reciprocation of the sleeve C, and the spindle is subjected to wear in but one direction, namely, that caused by its own rotation. The avoidance of the crossing of lines of wear saves the life of the parts and reduces friction. T he abrasive element, in the present illustration, the grinding-wheel B4, is fast on one end of the spindle B3. The grindingwheel is shown securely held between a pair of collars BT and B. The collars BT and B8 and the grinding-wheel are set together by means of a tl'unnb-screw BQ, thus 4effecting means for the ready removal of a worn-out wheel and its replacement by a new one. The spindle B will be rotated intermit tently by means of a belt passing over a pulley B, held to the spindle by means of a setscrew Bf. The mechanism for intermittently operating thebelt will presently be described. During the rotation of the grindi1'ig-v.'hcel, it is also reciprocated. A lever I), is illustrated for performing this work. The lever D is mounted upon an up right DT, held in place thereon by means of a cottenpin DI", and carries at its forked end a pair of pins D2, D3 which are provided with rollers D4, which engage the collar (la and a collar C, pinned to the spindle B3.

The lever D is Vrocked for the purpose of reciprocating the grindingwvheel by means of a wrist-pin BS mounted upon a crank-disk E5, which isfast on a shaft E, which shaft is rotated in its bearings EQIP, by means of a pulley 4ll4 f-.i'st upon it, from'mechanism presently to be described. The bearings lil', lig, arc inthe nature of standards supported by a plate E, mounted upon the bed-plate. A connecting-rod F, connects the crankwrisbpin and the free end of lever D. A, block I1", is mounted on the wrist-pin E, and is shown held in position by means of a washer and Cotter-pin E. This block is connected to one forked end of the connecting-rod l?, by means of bolts F2, F, A block ll", is mounted on a wrist on the free end of the lcvenD, and is secured to the other forked end of the conneetingrod l", by means of bolts F5, 1"". A suitable washer and Cotter-pin F7 is illustrated' for. securing the block F* in position. Thus it will be seen that upon the rotation of the shaft ll, the spindle B3, will be reciprocated, which will canse a reeiproeation of the grindingwheel B, such reciprocation taking place during the rotation of the grindingwivheel.

After the blade has been properly positioned in its holder, suitable mechanism will be brought into play for bringing the blade into proper engagement -with the grindingwheel, and this movement is utilized for inaugurating the rotation and reciprocation of the grinding-wheel B4. In the present 'illustration the belts connected with. the` pulleysaBLand E, run over pulleys T, T

which are fast upon a shaft S', supported in suitable hangers S2, S3, carried by a base-` gear during the rotation of the shaft E3 and spindle B3. The belt-shipper is shown comprising a belt-engaging member mounted upon the reciprocatory shaft T9. The belt is held normally on the loose pulley S, by the action of the spring U, which is attached to hanger S2 and to arm T7 rigidly attached to slidable shaft T, which the lat ter has a tendency to move in a direction to cause the beltshipper to ship the belt on to the loose pulley S". The belt-shipper is moved into the active position by 4means of a bell-crank lever U1o pivoted on the shaft T, of the worm-gear '13, and having means of connection U, with the tripping-rod V.

A. clutch-member or drum T", is mounted upon the shaft wT, and has a frictiomface abutting a friction-face provided on the worm-gear T. A friction-disk T is interposed between these members. The frictional contact is produced by means of a suitable compressionspring T".v Drum T5 holds the belt-shipper in such position that the beltwill remain on the fast pulley. Openings T10 are provided in the drum to receive the end of the arm TT at predeter mined intervals and permit the belt-shipper to move and ship the belt on to the loose pulley responsive to the spring U'. The member T7 is fast with the spindle T, controlling the helt-shipper and is prevented from rotation upon the axis of the spindle T0 by having an extending arm T11 forked' to engage the shaft S. Fast with the memberTis a lug or engaging finger UG which is engaged by the forked-end U5 of the bellcrank-lever U10 pivoted upon the shaft T of the worm-gear T5. The other end U2, of the bell-cranklever l 1,is connected with the actuatingrod V. By drawing the actuating-rod o V downwardly in the present illustration, the

shipper and associated parts will be moved by spring U8 toward the right in Figs. 16 and 17 which will cause the arm U2 of thc bellcrank lever to rise4- and draw upwardl on the actuating-rod V. The object of this portion of the device is to permit a 'predetermined amount ot' movement othe grind ing-wheel at each operation. After a blade is placed in the holder, mechanism will be actuated for bringing the blade intoproper relation to the grinding-Wheel, which will draw down upon the actuating-rod V and inaugurate the movements of the grindingwheel. Upon a predetermined amount ot grinding-Wheel movement, determined by the positioning of the openings T1", the upward movement of the arm U2, drawing up Wardly on the actuating-rod V, will trip the mechanism for releasing the blade-holder and cause this to be withdrawn from the grinding-wheel. The detail description of this mechanism will appear in its proper place.

The blade-holder is shown comprising a pair of jaws lll/v3, lV, held together upon the `work by means ol springs W2, W2. These jaws are carried by a shank K10, one of the jaws being shown fast thereon and the other pivoted at W'S. An actuator W 1s provided., by which the jaws may be separated against the tension of the springs lll/2, for the purpose of permitting the removal and insertion ot the blades WV; @ne of the jaws may be provided with pins WF, for entering holes in the blade, which pins in practice Ynay pass through the other jaw.

One of the objects olf this invention is to produce the same angle and the same results upon the blade, Whether this is presented to a'wheel which is new and of its maximum radius, orivhether it is presented to a wheel which has been conside `ably worn away an is of a radius small relatively to the radius of the wheel when new. To accomplish this successfully the blade must be presented to the wheel at a proper' angle and on a proper portion of its periphery, and be maintained in a practically horizontal plane. The niemaiiism herein illustrated for effecting this movement et the blade comprises a series of linkages or levers.

An angle-plate G, is shown mounted on the bed-plate A. Such plate G, is provided with a Ytace for resting upon the top of the bed-plate and a lace tor-engaging the edge bed-plate which runs transversely o the airis of the spindle B3. This plate G, is provided with longitudinal slots G, in which suitable tap-bolts may be mounted for permitting the adjustment of this plate toward and from the shaft or spindle B3. The plate G, is for the purpose of supporting the mechanism which carries the bladeholder. The angle-plate G, has mounted upon it a pair of supports G2, G3, in which is mounted a shaft H, which is held from rotation. by means of setlscrews H2. A .frame A H1", is mounted for oscillation on the shaft H. The frame H3 is-somowhat in the nature of a yoke' having its ends mounted outside the bearings G2, G5. vrihe back end o the frame 3 is provided with a sector-shaped extension H4, which by means of a cord il, supports a weight Hi', for the purpose ol counter-balancing the trarne and raising the front end of the same. The limit of movement of the frame upwardly at the front end and downwardly at the back end is adjust-- ed by means of a set-screw H10, which will engage the bearing G4, which is :red relative to the axis H of this frame. T he front end of the frame H3. carries the work-holder and is provided with a pair of pivot-screws K2, loclred'in position by means of nuts KS. Upon the pivot screws is mounted the bodymember of the standard K, which body member is provided with a face-plate K, which face-plate is maintained in a substantially vertical pla-ne and transverse of the axis of rotation of the grinding-wheel. holder l, is supported upon this lace-plate and is adjustable thereon about Lits axis in the plane of plate l", the adjusting device being shown as ay pair of eccentrics lli, which can be moved into proper position and locked by means oi set-screws lvl. 'l' his holder KB is provided with a suitable recess for receiving the shank K10, of the bladeholder. A suitable spring-lock comprising a spring K carryingv a deteut lil for eutering a circiun'lerential groove K13 in the shank K10 is provided lor holding the shank in position in the holder' K8. A standar Gm approXimately the height of the standard K is held tast upon the non-rotary spindle ll, by means of a set-screw ll?, this standard having a biliurcated lmver end G1 which straddles the base ot the supports (if and (la permitting pivotal adjustment of the standard on the spindle H by the setscrew H, set-screws il being provided in the bilurcated portion G14 for plumbing the standard. Said standards are, at the tops,l connected by a link li, which is mounted on the standard G10, by means a pin lll. on the 'standard l, by me i of a pin l?. Upon the rocking 'of the ,traine ll, the blade-holder would normally move through the arc of a circle, out by means oi' the connection between the standards K and il, the standard K is rocked on the 3pivotpins K2, to such an extent that the blade holder and the blade will be maintained parallel 'with the surface of the labrasive element durir i; their movement toward and from the grindingovheeL in right line.

radially-of the axis of rotation there or'. The worlrh ldercapable of oscit lation on the shank Km in the cess of the holder K thus enabling the blade to accommodate itself to Jany irregulari-ties orvibration of the parts as the blade is moved into engagement uth the grinding-wheel and compensating for any errors in the adjustment ot' the parts.

ico

' the detent R1 on the pawl R2 and re A frame N in the nature of a yoke, is mounted on the non-rotary spindle H, the ends of this frame being shown disposed outwardly of the adjacent ends ot' the frame or yoke lll. The front bar'of this yoke is disposed underneath the end members of the yoke or frame lla. One of the end menr bers of the yoke or frame H3, carries an ad- 'ustable abutment in the form of a set-screw which upon the rising of the frame N will be engaged for the pu'ruose of raising the front end of the frame l and thereby the workholder.

T he plate G carries a bearing G* disposed transversely of the fixed shaft H. A shaft G, is mounted in the bearing-G. A camwheel Gr11 is fast on this shaft and engages an antifricton roller P2, carried by the frame N. The shaft G5 has fast upon it a segmental lever (i8, which carries by means of a suitable cord a weight G. This weight is forthe purpose of effecting the raising of the work-holder. The frame N is provided with a series of adjustable weights N for the purpose of pressing the frame W. down.

A lever R, is sup orted on a shaft R, and carries a roller R in the path of movement of the cam-wheel. An actuator in the form of a fingenkey Gr7 is `fast with the shaft G. When it is desired to render the mechanism active upon the grinding element and bring the work into engagement with the saine, the actuator (l1 will be depressed, permitting the roller l2 to run down the face of the cam, which will permit the frames N and Ha to be lowered at the same time. The appropriate surface of the cam G will engage the roller R and depress the lever R, which is connected with the actuator-rod V, drawing this rod downand so actuating the parts which move the belt-shipper into a posiw tion to cause the belt to be shipped on to the fast pulley. The camfwhee is provided with a projection G, which, uponpthe down miovement of the actuator G1, will bebroughtv into a position to engage a detent or pawl R?. which is mounted on the s indle R. A4

coil-spring surrounds the spin le R and engages a pin Rt at one end and at the other end engages a lug R"1 on the pawl Rz flor forcing this into its active position,that1s forcing it into such a position that upon a movement of the actuator and cam-lever forstarting the mechanism, the pawl will engage the abutment G" and hold the various parts* in their active position until the opening T 0 is presented :to the member T7, when lthe belt-shipper will more and at the same time raise the member l. of the.bell-crank-lever, which will draw up on the actuator-rod V, and rock the arm li. and pawl R2, against the action of its spring` the detent-v R car ried bv the lever It simultaneously enraging easing the canrwheel, which will raise the frame N and the, frame H, ai@ weight Gi being of sullicient stren th in connection with the weight H5 to ci 'ect this elevation.

rThe -speed of reciprocation of the grinding-elen1ent will be so adjusted and timed relative to the speed of rotation thereof that while the work is being en aged by the grinding-element, there will ie the resultl ant of a compound movement which will produce a series of scratches disposed at an angle to the cutting edge, .and owing to the fact of the reciprocatory movement, the grinding scratches will cross each other transversely upon the beveled edge which is ground. The production of ser .Lches is in the employment of customary abrasives in evitable. By so controlling the angle of abrasion that the scratches made by one wheel traverse will transversely cross those made bythe previous traverse these latter will be more completely obliterated than Vwhen the intersection of the suooeive scratches is at a small angle or if the scratches are all disposed in the same direction. The -grnding'element will run in` a suitable hath Vwhich may be provided by a tank R, supported Qn bars R7, R'.

It will be seen that the support for the holder will, by means of the eccentrics M, M. be adjusted abo ut a pivot, in the present illustration inthe nature of a set-screw M. After the adjustment has been effected the pivot screw magl be set down to assist inthe holding of parts in their position of adjustment. The adjustment about this pivot-point Mz is in a direction transverse to the pivotal axis of the frame H andhin the present instance is substantially parallel with the axis of rotation and the line of reciprocation of the grinding element.

Adjustment of this support toward and,l

from the axis in a direction transverse to the pivot M2 may be effected by means of a set-screw M. It will be seen that the holder proper for the work is 4oscillatory upon an axis substantially transverse to the axis M', upon which the ipport is. adjustable and substantially para] e with the axis upon which the frame H is oscillatory. This is for the purpose, as was above stated, of permitting the work to accommodate itself and compensate for errors injthexa.` ustnent of the mechanism. or those errors which may occur from vibration of the parte one relative to the other.

The work will be so presented to the Jrinding element that it will move or rather its edge will move in a plane which is radial of the grinding element. By this means the same bevel will be imparted to the blades,

whether they are presented` to a grindin l wheel of relatively large or relatively sma diameter. This is so that as the wheel wears awaythe quality of the work will not be 1m- 'Dui-ing 'lio grinding operation it is nimble, when vor): thin Work is boing noted upon7 :is ioi' idonee tliiii razor blades, that the. odge olE 'Llio work noted upon be .fnv ported indopoinlontly of the Support :iiioi'ded 'by tli@ workliolflor. ii the present iliustriition u ypr f sire-pleite or preM robar l., iS provided Soihtliis pu "pose, .vliioli is inor- :ilile iii tlio pleine iii which the @ge @if tl; work is movable. This proasur-J-p tlir pro.

'n mijn so posi- ;.ing inlfe'of tlm lilzi-ilo. The into fx has inst with itin Htiiiffiiiril N, n ii( i is Con-- iwi-toil by inciinl' of i link N wif stand- 7 iiii 'clin noiifrolfitu. i ll; 'l`lio Connrctiou liotwien the ip'rzunfxze. oi' yokos l und permits :i Coi-tuin iinioiiiit of indopcniicnt nioi'oineiit ono rifliitiw to 'ille other. Tl 1will permit the n-iiglith` iiiounncl upon'tl'io spindlo Ti, lo heroine iiC- tiro upon tlir pressureplinio i) unil rniiraie tlio snow to r'ngiig'i. iii@ edge oi the iiliulr' :it this Sido opposite tliiit. u'liirli ifi infin ground und liolii it in intimato Contact 'with uw grinding vlzinont throng;- f its emiro length. l

y i"iltlioiigii but one. toi-iii o? in 'i luis boon illusti'ritoii .finfl Uiosiziibril it will i; apparent flifit (-iin'igos: inn" no murio wiilioi fio-porting' from ilio spirit ol3 my Lion.

'-ivii'ig tous ilcoiiliimgi my initiation Y mont, ying oirniiit, iiiocl'iiii'iisn'i for rit-ing; Work tin-i .i'orl iiiiro bnr imiopoiiflum :imi Work iiirryii'ig clement for iippldng;

This pluto i to ying;

u'itli ilio in yn for presenting i T Y Y erzitii'e, inn ins-luis im..

i' for i iunlicnnfg iii@ guns@ upon. ii r presenting Elio work be.

und. pivotal means locute sain pressure wir ior equnlizing tno distribution of pressure upon 'Ss-.id wor i.

l. In a grini" iniicliine, the combimtioii with :i griiitlziig fvlie'al and moti is for rotating the, same. :intl for simultaneonly rer-iproiiitiiig it in on of of :i lilin'io boli-iov support. ii'i'l a imi' support niouL ld. to tizro iiiiiepe, y on :i roiifnioii axis amending it ung/'lea to ilus. uxiii of Suid Wlieeh :i bladeioliler riiriirf by tire linie liolilei Support anni :ulzipteil to prosoiit the ai' g of ii blade to the grinding Wliei. iii ,mi nl ni n'itii-tlip :ixus

i ling' iiiniliino. tli'r con liar iwvtutiiig the, :Quinn oi' u l'ilzulo lioliivi' ocziicl in position anni :ulziitifi to prenant iiio of u iilzuli: to Saiiil wlnoi. in pnriillfliuin with tlio uir, oi iii@ lutter. mul liroriiloii wi'tli ii lutrrlly extending ravin. i lilml@ holder Support on .vliicn suini sioni iis journnlffi.r nziiil support ooi iiiomililo toward und away :from Sfiiii urli el in :i plinio triiiisvriso with rfsi'ifsrt to ill-'f :mis ol. tlie wheel. :incl n, priv-siii imi movable. to iii'ul from the who-0l iiulspriu'iviitly ol' the liliiii@ liollir :il .il lomitiz-(l in position und mlup'tiul to liolcl tlie @tigo of ilu lilzule, :illziiiist nifl wliecl.

ii ii 'iiinliiig ii'iiu'iiiiio,v lli@ coinbiiintion with :i Ii iiiiiing; u'liiol und means for rotatin@7 tiio saine, of n blad@ holder locntcd in position unil iiiizipcfl to present the orig@ of :i loliirle to suii` wheel. :i Coiinter-loiiliinmd' i'iiiino to Whirli @nifl lilmio lioidr is Sccui'efi. Said from nul lilude lioliler boing movable toward :mii from tlife wheel. :i Weighted pressure our 'Frame mounted to move touiii'il mul' 'from the wheel.'inilopeiulontly of lli@ l'ilaulo holder. nml proi'ulid with :i pressur@ iiiir loriitieii in position und adopted to .wss tio bind@ against the Wheel, means for i tion with u Liniiling wlicel :intl n uns io,

raising and lowering said pressure bar frame, and adjustable meanfa` between the pres:r re har frame and the counter-bah anced frame constructed and adapted for roi-,trolling the movements of the latter toward and from the wheel by the correspondingmovemcnts of the former.

7. In a grinding machine, the combination with a grinding Wheel, of a work holder, a pivotally mounted presser' for the Work, and means `for maintaining the operative surface' oi the presser in alinement with the sni'l'acc oi the grinding wheel.

grinding machin having a grinding element, a ivorloholder,"and timing mechanism for automatically stopping the operation ot said grinding clement and shifting the .vorhr holder upon a predetermined amount of movement of the grinding element.

A grinding machine having a grinding elcn'ient, a Worloholder, means for moving the 1crit-holder into operative position adjacent the grinding element and for simultaneously starting the operation of the grinding element, and means for automatically stopping the operation of the grinding. elenient and moving the Worloholdcr away from said grinding element.

10. A grinding machine having a grinding element, a pivotally-movable frame, a work-holder support pivotally connected with said frame for movement on an axis transverse of the pivotal axis of the frame,

, a ivorleholder pivotally connected with said work-holder support for movement on an axis parallel with the .pivotal axis of the frame, and means for moving the work holder toward and away from the grinding element and simultaneously starting and stopping the operation of said grinding element.`

11. A grinding machine having a rotary grinding element, a frame pivotally movable about a fulcrum at right angles to the axis of the grinding element, a Work-holder support pivotally connected with. said frame, the fulcrum of 'said Work-holder-support being parallel with the axis of said grinding element, a work-holder pivot-ally connected with said work-holder support, and timing mechanism for automatically .stopping the operation of the grinding element upon the completion of a predetermined movement of said element. i

1Q. A grinding machine having a grinding clement, a pivotallly-mounted frame, a wo1'k-liolder connected with said frame, a gravity-actuated pressenbarvlocated in position foracting directly upon work in said holder, and means for raising and lowering said frame and presser-bar. y

13. A grinding machine having a grinding element, a pivotal frame, a work-holder connected with said frame, a gravity actuated pressen element, reciprocating and rotating mechanism for said grinding element, a manually-operable device for lowering said work-holder and presser element and for starting said reciprocating and rotating mechanism, and means for automatically raising said worlcholder and presser element and stopping said rotating and reciprocating mechanism.

14, In a grinding machine, the combina i tion with a grinding wheel and means for rotating the same and for simultaneously reciprocating it in the direction of its axis, of a blade holder adapted to automatically present the edge of the blade to said wheel in parallelism with the surface of the latter, means for maintaining the entireeurface of the edge of the blade being operated upon in intimate contact with the grinding wheel, and means for moving said blade holder toward and from said Wheel in a plane defined by the edge of the blade and the axis of the wheel.

15. In a grinding machine, the combination with a grinding wheel, of a work holder, a pivotally mounted presser for the work, means carried thereby for engaging with and maintaining the work in intimate contact with the grinding wheel and means for maintaining said latter means in alinement with the surface of the grinding wheel.

In testimony whereof, I have signed my name o this specification in the presence Aof two subscribing Witnesses, this eighth day pf lay, A. D. 1905.

p WILLIAM E. NICKERSON. l

Witnesses:

KING C. Gnimfn'rn, L. G. Ban'rnm. 

